Data Harvest 3285 Panduan Memulai Cepat - Halaman 6
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EASYSENSE Laser module with Optical slides
Investigations
Young's single and double slit experiment: Finding the wavelength of the light passing
through the slit.
Young's single slit experiment: Finding the width of a slit that the student has produced
using a pair of sharp edges (razor blades).
Finding the wavelength of light using a diffraction grating.
Finding the spacing of the slits in a diffraction grating.
Optics experiments that need a single slit e.g. angle of incidence of a refracted beam
through a glass block.
Demonstrate X-ray diffraction of crystals using the M grating (two diffraction gratings
crossed at right angles).
Using the Laser module directed to the infrared receiver on a Smart Q Light Gate to
record data from an object interrupting the infrared beam.
Young's single slit experiment
Wall
1. Set up the experiment in a darkened (but not blacked out) room. The Laser module
should be held in a clamp and positioned so the laser beam can be pointed to a sheet of
paper fixed on a wall or screen approximately 1 meter away.
2. Clamp the Laser module so it points towards the wall; the laser beam should be
positioned 20 cm above the surface of the bench.
3. Make sure no one can casually walk into the path of the laser; if necessary place a
temporary barrier to restrict access.
4. Clamp the optical slit slide (A – J) with the front of slide facing towards the Laser and place
in front of the Laser module so when the laser is activated its beam will pass through the
slide.
Note: When the slide is viewed from behind the Laser module the lettering on the slide should be
the correct way round.
5. Connect the Laser module to an input on the EASYSENSE unit; make sure the unit is
powered. Check that no one is in the path of the laser. Press the button switch on the
Laser module to switch on the laser beam. The beam will appear as a red spot on the
wall.
6. Stand behind the Laser module (so you do not view the laser directly), and adjust the slide
so it is less than 5 cm from the Laser module. Move the slide so the laser beam is directed
through the centre point one of the slits (A – J) and a pattern of alternating bright and dark
bands is visible on the wall (try different slits to get the clearest pattern). Make any further
adjustments to the laser position or slide position to get the bands as sharp as possible.
Optical slit slide
Laser beam
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DS058
Laser module
Retort stand